Mitsui Engineering and Shipbuilding Company Limited

Noboru Takemura

Masahiro Saito

Shuji Ueki

Takeo Nojiri

Masabumi Matsumoto

Yukirou Kadomoto

Masahiro Kuwajima

Izumi Onishi

Taishi Sato

Gaku Taniguchi

A membrane treatment apparatus includes a filtration membranefiltering raw water existing in an external environmentby applying pressure thereto and a treated water outletfrom which treated water collected after filtration by the filtration membraneis taken, and is provided with a filter clothplaced and fixed outside the filtration membranewith a predetermined space left between the filter cloth and the filtration membrane. Preferably, the filter clothis provided in such a way as to cover an outer circumferential side and a bottom of the filtration membrane, and the filter clothis provided in such a way as to cover the outer circumferential side of the filtration membranewith the bottom thereof uncovered.

Membrane treatment apparatus

The present invention provides a ballast water treatment system including a reaction tank in which raw water and ozone are imported and made to react each other for a predetermined period of time to kill microorganisms existing in raw water, an ozone decomposer in which water containing residual ozone discharged from the reaction tank is imported and the residual ozone is decomposed, and a circulation pump installed between the reaction tank and ozone decomposer, forming a circulation system which removes the residual ozone by means of circulating the water containing the residual ozone between the reaction tank and ozone decomposer. Accordingly, this system dispenses with a deaeration tank which would require a wide space for installation, small cost and is able to be applied to existing ships easily.

Ballast water treatment apparatus

A ballast water intake and treatment system is disclosed, the system including a membrane treatment unit arranged in or on a ship hull for the separation of microorganisms of no smaller than a given size and organized to execute filtration during the intake of sea water or fresh water outside the hull into ballast tanks by the use of an intake pump installed consecutively with the membrane treatment unit. The system checks the invasion of microorganisms, etc. of no smaller than a given size during the intake of ballast water and allows ballast water free of microorganisms, etc. of no smaller than a given size to be fed into ballast tanks.

Ballast water intake and treatment system

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Tokyo, Japan

Noboru Takemura